Anderson, Alexander P. (1862–1943)

In December 1901, botanist Alexander Pierce Anderson created puffed rice while experimenting with starch crystals in his laboratory. Although he did not yet realize the significance of his discovery, Anderson's new breakfast food would make him a nationally known figure and the face of a Quaker Oats advertising campaign for almost a decade.

Bruns and Finkle Grain Elevator, Moorhead

In 1878, Red River Valley businessmen Henry A. Bruns and Henry G. Finkle built the first steam-powered grain elevator in the United States. In its first harvest season, the grain elevator handled almost 250,000 bushels of wheat from more than 5,000 wagons.

De la Barre, William (1849–1936)

While working at Minneapolis's Washburn mills in the late 1870s, William de la Barre became an internationally known hydroelectricity expert and a key player in the development of water power at St. Anthony Falls.

Duluth Ship Canal Opening, 1871

The opening of the Duluth Ship Canal in 1871 was a historical turning point for the city of Duluth and the Twin Ports of Duluth and Superior.

Goodsell Observatory, Northfield

The Goodsell Observatory and its predecessor, a smaller observatory that opened in 1878, helped keep trains running on time and brought national prominence to Carleton College in Northfield, Minnesota, in the late nineteenth century and early twentieth century.

Hot Ponds

The heated mill pond, or "hot pond," was invented around 1890. This innovation in Minnesota logging made it possible for logging companies to run their sawmills year-round.

Hydroelectricity in Minneapolis, September 5, 1882

Centralized hydroelectric power came on for the first time in the United States in downtown Minneapolis on September 5, 1882. Minnesota Brush Electric Company produced the power, beating a similar effort in Appleton, Wisconsin, by twenty-five days.

Pietenpol Airplanes

When Bernard Pietenpol started to build airplanes in his Cherry Grove workshop, he'd never actually piloted one. He only learned to fly once he had built his first plane. Nevertheless, Pietenpol's popular designs for lightweight, easy-to-construct airplanes made him the "father of the homebuilt aircraft movement."

Ronning Ensilage Harvester

Patented in 1915, the ensilage harvester improved on standard practices for harvesting and storing crops, and streamlined farm work. Its basic design, largely unmodified, is still used by agricultural implement companies worldwide.

The Honeywell Round Thermostat

The world's most iconic home thermostat was created in Minneapolis. The Round, designed by engineer Carl Kronmiller and designer Henry Dreyfuss, was introduced in 1953 by the company then known as Minneapolis-Honeywell. The Round became both a sales mainstay and a world-renowned piece of industrial art.